Liquid-fuel burner



June 8 1926. r

' H. E. DALZELL LIQUID FUEL BURNER 6 Sheets-Shet 1 Filed Sept. 8, 1922 4|- lillvlll /A/VENTOR H. tTfiALzb-LL ATTORNEYS June 8 1926. 1,588,315

H. E. DALZELL LIQUID FUEL BURNER Filed Sept- 8. 1922 6 Sheets-Sheet 2 /N VE/V 708 ATTORNCYS June 8 1926. 1,588,315

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June 8 1926.

H. E. DALZELL LIQUID FUEL BURNER 1922 6 Sheets-Sheet 6 Filed Sept. 8

J J I I l 1 I l I I F LIIIILI I |4|||| M/I/AE/VTOR h. f. DALZELL 5V Patented June 8, 1926.

UNITED STATES HAROLD EDWARD DALZELL, 0F EYNSHAM, ENGLAND.

LIQUID-FUEL BURNER.

Application flied September 8, 1922, Serial No.

This invention relates to liquid fuel burners for use in steam raising plants and in other furnaces and has for its object to provide an improved construction of burner adapted to meet rapidly and economlcally the demands for varying quantities of heat as for instance in locomotive boilers where greatly varying amounts of steam are required according to the grade of the road traversed and the loading of the tram worked.

One object of the invention is to provide a novel arrangement of valves, under asmgle control, for proportionately regulating the amount of fuel and atomizing agent, discharged from the burner head. a

Another object is to provide an ad u stable lip plate for varying the effective size of the discharge slot for the atomizing agent.

The invention is hereinafter more fully described with reference to the accompany ing drawings in which various forms of construction are illustrated Figs. 1 and 2 being side and end elevation respectively of one form of burner and Fig. 3 a plan of Fig. 1.

Figs. 4 and 5 are plan and elevation of a valve for controlling the fuel in the above construction and Fig. 6 is an end elevation of the same.

Figs. 7 and 8 are elevation and plan respectively of a valve for controlling the atoimizing agent in the above construction an Fig. 9 is an end elevation of the same.

Figs. 10 and 11 show in front and sectional view respectively, a modification of the invention and Fig. 12 is an under plan of the same.

Figs. 13 and 14 are end and side elevations respectively of a further modification of the invention and Fig. 15 a plan of the same whilst Figs. 16 and 17 show in end and side elevation a slight variation of the form illustrated in Figs. 1 to 3.

Referring to the construction shown in Fi 's. 1 to 3 and the details in Figs. 4 to 9, it will be seen that the burner comprises a hollow metallic body having two separate longitudinal passages a and b one above the other for conveying liquid fuel and an atomizing agent such as steam to the mouth of the burner. The upper passage (1 to which liquid fuel is fed under slight pres- 586,837, and in Great Britain March 22, 1922.

sure due to gravity is of larger cross section than the lower passage b which conveys the steam, and both passages are provided with suitable inlets for connection with the fuel and steam supply pipes.

These two passages terminate at the mouth end of the burner in two cylindrical chambers a, 6 within which rotary valves 0 and 03 shown in Figs. 4.- to 9 are arranged to operate together in regulating the quantities of oil and steam projected from the burner. To this end, the axes of the two valves are disposed horizontally and parallel to one anotherand toothed sectors 0, d attached to the valve stems at one end are arranged to 'interengage in such manner as to cause the valves to rotate together. Operation of the valves is effected by any suitable mechanism connected with a shank c projecting from the opposite end of the valve 0 and limits to the movements of the valves are imposed by stops a c on the valve 0 en aging a lug or projection a upon the body of the burner.

The oil valve 0 is formed with a passage way 0 which is preferably of parabolic semi-circular or triangular form in cross section whilst a corresponding passage way at in the steam valve is preferably of cycloidal semi-circular or triangular shape so as to ensure a. suitable increasing or decreasing effect by rotating the valves in their respective chambers.

These valve passage ways 0* and a? cooperate with substantially rectangular outlets a and b the latter of which is fitted externally of the burner with a removable and adjustable copper lip plate e by means of which the extent of the steam outlet can be regulated independently of the valve. This lip'plate is for preference formed with a slightly hollow front face and upper edge in order to prevent oil spreading over the full face. of the plate when the valves are partly closed, and the plate may either be vertically arranged upon the front end of the burner or disposed at anangle to form a sloping runway to guide the oil to the steam outlet.

In the modified form of construction illustrated in Figs. 10, 11 and 12 the longitudinal passages f and k. in the burner body for oil and atomizing agent terminate in horizontal slots f and h and the front end of the burner is constructed with a flat face upon which is mounted a plate valve 2' operating slidable to control said slots f and h, said valve having a triangular or other suitable openin 11. The plate valve 11 moves between vertica guide strips 7: at its edges which may be formed integral with a shield plate j adapted to cover the front of the valve and having a central aperture j through which the fuel and atomizing agent emerge.

A toothed sector is carried upon a short s indle is rotatably mounted in brackets ependi-ng from the burner body is arranged to engage a toothed rack is attached to the lower portion of the plate valve 2' 1n such manner that by rotation of the spindle the valve can be raised or lowered between limits determined by a stop a on the one hand and the rack 70 on the other hand. In this construction the outlet h for the atomizing agent may be adjusted independently of the valve i by an ad ustable and removable plate Z forming the lower 11p to the said outlet.

It will be readily understood that 1n view of the fact that the quantity of steam or a1r supplied is regulated by variation of the actual outlet orifice, the velocity of the steam or air will remain the same and complete atomization will be ensured at all degrees of adjustment. sults in a reduced consumption of the atomizing agent as well as a general improvement in action. graduation and adjustment economizes fuel and eliminates the undesirable drumming and inefliicient action common to ordinary burners controlled by valves or cocks located at some distance from the head of the burner.

In a further modified form of construction illustrated in Figs. 13 to 15 the oil and atomizing agent are conveyed through longitudinal passages m and n respectively in the burner body and both of these passages terminate at the burner head in horizontal rectangular slots m and n. The oil outlet m in this example is controlled by a valve in -rotatable about a vertical axis in a seating behind the burner head and retained in place by a cap m screwed or suitablv fastened on to said head, whilst the outlet for the atomizing agent is regulated by an adjustable and removable lip plate 11. as in the construction previously described. A spindle m upstanding from the centre of the oil regulating valve is connected by any suitable mechanism to an handle by means of which the oil sup ly maybe controlled from the exterior I of t e furnace.

The modified construction of burner shown in Figs. 16 and 17 is similar to that first described in connection with Figs. 1 to 9 in that the burner body is formed with separate longitudinal or other shaped passages o and p for oil and an atomizing This naturally re-" This method of agent and provided with two interconnected rotary valves 0 and p for simultaneously controlling the outlets of said passages. In the present instance however, the substantially triangular passage ways 0 and 2 in the rotary valves are inverted relative y to those shown in Figs. 1 to 9 and an adjustable lip plate 9 for regulating the extent of the steam or air outlet is applied to the burner head in an angular position so as to form a sloping runway for leading the oil to the stream or jet of atomizing agent. The plate 9 is held in adjusted positions by screws 9 which pass through slots 9 in the plate and engage threaded holes in the burner head. In action this burner operates in precisely the same way as that first described.

Preferably, the upper Wall of the fuel outlet shown in Figs. 16 and 17 is provided with a central deflector or guide in the, form of a lug a: to deflect the oil upon the atomizing agent. Instead of casting this deflector or guide upon the burner head, it may be connected therewith in some other adequate manner.

I claim 1. A burner comprising a horizontally elongated body having a head at one end and upper and lower horizontal discharge slots opening through said head, said body having an upper longitudinal liquid fuel passage leading to the upper slot and a lower longitudinal passage for an atomizing agent leading to the lower slot a valve for said upper slot associated with said head, and a lip plate secured to said head and adjustable vertically to vary the effective size of the lower slot.

2. A burner comprising a head having a air of valve chambers, a liquid fuel inlet or and outlet from one chamber, an inlet andoutlet for an atomizing agent associated with the other chamber, rotary valves in the two chambers for controlling the discharge from the two outlets, and means connecting said valves for operation in unison to proportionately control the discharge of the fuel and the atomizing agent.

3. A burner comprising a body having a head at one end formed with an upper horizontal liquid fuel outlet slot and formed under said slot with a second horizontal outlet slot for an atomizing agent, and a valve slidable vertically across the slotted side of ,said head and having an opening communicating with both of said slots, said opening being narrowed toward one end to vary the elfective size of said slots when said plate is adjusted.

4. In a burner, a head having upper and lower valve chambers, a liquid fuel inlet to and a liquid fuel outlet from the upper chamber, an inlet to and an outlet from the lower chamber for the passage of an atomizing agent, rotary valves having passageways of triangular cross section mounted in said chambers, and interengaging toothed sectors on said valves for ensuring their simultaneous 0 eration to proportionately vary the size 0 the outlets, said outlets being the final outlets from the burner and being disposed in close relation with each 0t er to effect mixing of the fuel and atomizing agent when discharged from the burner to form the spray.

5. In a burner, a head having upper and lower cylindrical valve chambers with horizontal axes, separate passages extending longitudinally of the burner for conveying oil and an atomizing agent to the upper and lower chambers respectively, horizon tally disposed outlets from the upper and lower chambers, rotary Valves in the chambers, stop means for limiting the rotation of one of said valves and gearing connecting the valves for simultaneous operation in regulating the discharge from the outlets,

said outlets being final outlets from the burner and being disposed in close relation let from the lower chamber for the with each other to effect mixin and atomizing agent when disc arged from the burner to form the spray.

6. In a liquid fuel burner, a head havin upper and lower valve chambers, a liquid fuel inlet to and a liquid fuel outlet from the upper chamber, an inlet to and an outassage of an atomizing agent, rotary valves aving passageways of triangular cross section mounted in said chambers, interengaging toothed sectors on said valves for ensuring their simultaneous operation to proportionately vary the size of the outlets and a guide pro ection depending from the upper edge of the fuel outlet for the purpose of guiding the fuel .discharged, said outlets being the final outlets from the burner and being disposed in close relation with each other to effectmixing of the fuel and atomizing agent when discharged from the burner to form the spray.

In testimony whereof he has aflixed his signature.

HAROLD EDWARD DALZELL.

of the fuel 7 

